Resin, resin composition, method for manufacturing the same, and molded material including the same

A method for manufacturing a resin containing a polymer in which (A) a divalent structural unit having a spiro ring, represented by formula (1), is directly bonded to (B) a diol residue, represented by formula (2), and which has a number average molecular weight of at least 17,700:

• wherein R1 is independently selected from the group consisting of a hydrogen atom, a halogen atom, an aliphatic hydrocarbon group having the carbon number of 1 to 20, an aromatic hydrocarbon group having the carbon number of 1 to 20, and a nitro group;
• p and q are integers satisfying p+q=0 to 16;
• X independently represents oxygen, sulfur or selenium;
• Y is independently selected from oxygen and sulfur;
• and n and m are integers satisfying n+m=0 to 4;
• and
• —O—R2—O— (2)
• wherein R2 represents an alkylene group having the carbon number of 2 to 20, or an arylene group having the carbon number of 6 to 40;
• the method comprising the step of polycondensing a monomer which provides a divalent structural unit having a spiro ring, represented by formula (1), and a diol which provides a diol residue, represented by formula (2), in sulfolane and/or a halogen-based solvent at 100° C. or less.